Keywords: angular momentum
|States Waves & Photons : A Modern Introduction to Light - Joseph W. Simmons & Mark J. Guttmann|
Joseph W. Simmons & Mark J. Guttmann States Waves & Photons : A Modern Introduction to Light Addison-Wesley 1970 Acrobat 7 Pdf 10.1 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Optics; Quantum; Coherence; Angular Momentum; Stokes
|An evaluation of selected angular momentum, vortex shedding and orifice cryogenic flowmeters (Volume NBS Technical Note 650) - Brennan, J. A.; Stokes, R. W.; Kneebone, C. H.; Mann, D. B.|
Keywords: Angular momentum; Flow meters--Testing; Low temperature research
|Mechanics ( volume 2 ) - Hans Ziegler|
Hans Ziegler Mechanics ( volume 2 ) Addison-Wesley Publishing Company Inc. 1965 Acrobat 7 Pdf 33.3 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Kinematics; Kinetics; Newton's Laws; Angular Momentum; Gyroscope; Lagrange's Equations
|Problems in Quantum Mechanics - I.I. Goldman, V.D. Krivchenkov, V.I. Kogan & V.M. Galitskii|
I.I. Goldman, V.D. Krivchenkov, V.I. Kogan & V.M. Galitskii Problems in Quantum Mechanics Infosearch Ltd. 1960 Acrobat 7 Pdf 12.7 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Angular Momentum; Spin; Force; Atoms; Molecules; Scattering; Commutation Relations
|Analytical Mechanics - D.F. Lawden|
D.F. Lawden Analytical Mechanics George Allen & Unwin Ltd. 1972 Acrobat 7 Pdf 10.8 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Mathematics; Physics; Hamilton; Lagrange; Mass; Inertia; Euler's Equations; Angular Momentum
|The aerodynamic-force and heat-transfer characteristics of lifting reentry bodies - Armstrong, W. O.|
No Abstract Available
Keywords: PERTURBATION THEORY; VARIATIONS; ANGULAR MOMENTUM; EIGENVALUES; HAMILTONIAN FUNCTIONS; INDEPENDENT VARIABLES
|JERUSALEM MATHEMATICAL APPARATUS OF THE THEORY OF ANGULAR MOMENTUM - Levinson, I. B.|
Mathematical analysis of angular momentum
Keywords: ANGULAR MOMENTUM; ANGULAR VELOCITY; ANGULAR MOTION; MATHEMATICS /GEN/
|Fortran programs for the calculation of Wigner 3j, 6j, and 9j coefficients for angular momenta greater than or equal to 80 (Volume NBS Technical Note 409) - Caswell, Randall Smith, 1924-; Maximon, L. C.|
Fortran II and Fortran IV programs are given for the calculation of Wigner 3j, 6j, and 9j coefficients containing individual angular momenta less than or equal to 80. The large numbers, resulting from the factorials which appear in the expressions for th
Keywords: Angular momentum (Nuclear physics); FORTRAN (Computer program language)
|A neutron moments computer code, moment I (Volume NBS Technical Note 725) - Eisenhauer, Charles; Simmons, George L.; Spencer, Lewis V.|
Keywords: Neutron flux; Gaussian quadrature formulas; Angular momentum (Nuclear physics)
|An analytical comparison of some electromagnetic systems for removing momentum stored by a satellite attitude control system - Brown, S. C|
Electromagnetic methods for removing angular momentum stored by satellite attitude control system
Keywords: ANGULAR MOMENTUM; ATTITUDE CONTROL; MOMENTUM; SATELLITE ATTITUDE CONTROL; ANGULAR MOMENTUM; ATTITUDE CONTROL; CONTROL SYSTEM; ELECTROMAGNETIC METHOD; SATELLITE ATTITUDE CONTROL
|Effect of taper angle variation on the submillimeter, far-infrared transmission efficiency of linearly tapered light pipes - Shephard, G. G|
Angular momentum in transmission efficiency of tapered light source
Keywords: ANGULAR MOMENTUM; TAPERING; TRANSMISSION EFFICIENCY; FABRICATION; LIGHT SOURCES; PIPES (TUBES); SUBMILLIMETER WAVES; TAPERING; TRANSMISSION EFFICIENCY; ANGULAR MOMENTUM; LIGHT SOURCE
|Describing the Components of the Water Transport in the Martian Atmosphere - Montmessin, F.|
In this paper, we examine the meteorological components driving water transport in the Martian atmosphere. A particular emphasis is given to the role of residual mean circulation and water ice clouds in determining the geographical partitioning of water vapor and frost.
Keywords: HIGH RESOLUTION; SPECTRAL RESOLUTION; EXCITATION; ANGULAR MOMENTUM; GAS TEMPERATURE; SUBSTRUCTURES; CONTOURS
|An Overview of NASA's In-Space Cryogenic Propellant Management Technologies - Tucker, Stephen|
Future mission planning within NASA continues to include cryogenic propellants for in space transportation, with mission durations ranging from days to years. Between 1995 and the present, NASA has pursued a diversified program of ground-based testing to prepare the various technologies associated with in-space cryogenic fluid management (CFM) for implementation. CFM technology areas being addressed include passive insulation, zero gravity pressure control, zero gravity mass gauging, capillary l...
Keywords: ANGULAR MOMENTUM; DATA SYSTEMS; KINETIC ENERGY; TORQUE; ATMOSPHERIC MODELS; AIR MASSES; TRENDS; PERIODIC VARIATIONS; MOUNTAINS
|Payload Operations - Cissom, R. D.|
The objective of this paper is to provide the future ISS scientist and/or engineer a sense of what ISS payload operations are expected to be. This paper uses a real-time operations scenario to convey this message. The real-time operations scenario begins at the initiation of payload operations and runs through post run experiment analysis. In developing this scenario, it is assumed that the ISS payload operations flight and ground capabilities are fully available for use by the payload user comm...
Keywords: ROTATION; VISCOSITY; TURBULENCE; THICKNESS; SUN; HELIOSEISMOLOGY; OSCILLATIONS; ANGULAR MOMENTUM; ROTATING BODIES; ACOUSTIC VELOCITY; ENERGY LEVELS; HELIUM
|US Standard Catalog no. U-20 - NON|
Information regarding the availability of LANDSAT imagery processed and input to the data files by the NASA Data Processing Facility is published on a monthly basis. The U.S. Standard Catalog includes imagery covering the continental United States, Alaska and Hawaii. The Non-U.S. Standard Catalog identifies all the remaining coverage. Sections 1 and 2 describe the contents and format for the catalogs and the associated microfilm...
Keywords: ANGULAR MOMENTUM; SPACE SHUTTLES; SPACECRAFT RECOVERY; TELEOPERATORS; EQUATIONS OF MOTION; PRECESSION; SPIN DYNAMICS; TORQUE
|Reflecting on the First Three Years of TOPEX/POSEIDON - Fu, Lee-Lueng|
The U.S./France TOPEX/POSEIDON (T/P) satellite, in orbit since August 1992, is the first global ocean observing system specifically designed to study ocean dynamics. The satellite uses a state-of-the-art radar altimeter system to determine the sea level-the height of sea surface relative to a reference ellipsoid-with an was unprecedented accuracy. It is supplying a wealth of new information on ocean circulation and the patterns of the global seasonal cycle, low-frequency wave dynamics, gyre-scat...
Keywords: SHOCK WAVES; LEADING EDGES; ULTRAVIOLET EMISSION; ANGULAR MOMENTUM; STELLAR MASS; RADIO WAVES; TIME MEASUREMENT; ROTATION; TRAJECTORIES
|The effect of Low Earth Orbit exposure on some experimental fluorine and silicon-containing polymers - Connell, John W.|
Several experimental fluorine and silicon-containing polymers in film form were exposed to low Earth orbit (LEO) on a Space Shuttle flight experiment (STS-46, Evaluation of Oxygen Interaction with Materials, EOIM-3). The environmental parameters of primary concern were atomic oxygen (AO) and ultraviolet (UV) radiation. The materials were exposed to 2.3 plus or minus 0.1 x 10(exp 20) oxygen atoms/sq cm and 30.6 UV sun hours during the flight...
Keywords: INEQUALITIES; NUCLEAR SPIN; QUANTUM MECHANICS; ANGULAR MOMENTUM; DIMERS; EXPERIMENT DESIGN; MERCURY ISOTOPES; PARADOXES
|Principles of Dynamics - M.B. Glauert|
M.B. Glauert Principles of Dynamics Routledge & Kegan Paul Ltd. 1960 Acrobat 7 Pdf 11.5 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Mathematics; Vector Algebra; Newton's Laws; Polar Coordinates; Impulse; Momentum; Angular Momentum; Energy
|The Elements of Physics: Chapter 8 - Patrick Bruskiewich|
From The Elements of Physics by F.A. Kaempffer, The Law of Conservation of Angular Momentum Blaisdell Publishing Co. Toronto, 1967 `Man stretch thy reason hither, so thou mayest comprehend these things.` Johannes Kepler
Keywords: The Elements of Physics; Kaempffer; Chapter 8; Conservation of Angular Momentum
|Quantum Mechanics Volume II - Albert Messiah|
Albert Messiah Quantum Mechanics Volume II North Holland Publishing Company 1965 Acrobat 7 Pdf 86.9 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Angular Momentum; Pauli Exclusion Principle; Conservation Laws; Perturbations; Variational Method; Collision Theory; Relativistic Electron
|Quantum Mechanics - L.D. Landau & E.M. Lifshitz|
L.D. Landau & E.M. Lifshitz Quantum Mechanics ( Volume 3 of A Course of Theoretical Physics ) Pergamon Press 1965 Acrobat 7 Pdf 28.6 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Schrodinger's Equation; Angular Momentum; Perturbation Theory; Spin; Nuclear Structure; Collisions; Symmetry; Atom
|Exploration of Anomalous Gravity Effects by rf-Pumped Magnetized High-T(c) Superconducting Oxides - Robertson, Tony|
A number of anomalous gravitational effects have been reported in the scientific literature during recent years, but there has been no independent confirmation with regard to any of these claims. Therefore, the NASA Marshall Space Flight Center, in response to the propulsion challenges specified by NASA's Breakthrough Propulsion Physics (BPP) program, proposed to explore the possibility of observing anomalous gravitation behavior through the manipulation of Josephson junction effects in magnetiz...
Keywords: UPWELLING WATER; TWO DIMENSIONAL MODELS; TROPOSPHERE; WAVE DRAG; VORTICES; TROPICAL REGIONS; STRATOSPHERE; VISCOSITY; ANGULAR MOMENTUM
|Refinement of Methods for Evaluation of Near-Hypersingular Integrals in BEM Formulations - Fink, Patricia W.|
In this paper, we present advances in singularity cancellation techniques applied to integrals in BEM formulations that are nearly hypersingular. Significant advances have been made recently in singularity cancellation techniques applied to 1 R type kernels [M. Khayat, D. Wilton, IEEE Trans. Antennas and Prop., 53, pp. 3180-3190, 2005], as well as to the gradients of these kernels [P. Fink, D. Wilton, and M...
Keywords: ANGULAR MOMENTUM; IMAGE PROCESSING; AUTONOMY; ATTITUDE CONTROL; GEOSYNCHRONOUS ORBITS; GLOBAL POSITIONING SYSTEM; NOAA SATELLITES; STATIONKEEPING; MOMENTUM; PATTERN REGISTRATION; LONGITUDE
|NRA: First Multiwavelength, Multiple Layer Doppler Imaging of an Active Binary - Dempsey, Robert C|
In this final report, grantee reports on data obtained from 26 orbits of continuous observing time with the Hubble Space Telescope's Goddard High Resolution Spectrograph in order to produce a comprehensive 2-D image of the RSCVn V824 Ara at MgII, CIV and for the first time ever, the coronal diagnostic line of FeXXI 1356A.
Keywords: GEOS 1 SATELLITE; EARTH OBSERVING SYSTEM (EOS); ATMOSPHERIC MODELS; CLIMATE; ANGULAR MOMENTUM; ASSIMILATION; DATA SYSTEMS; WATER VAPOR
|Space Benefits: The secondary application of aerospace technology in other sectors of the economy - NON|
Some 585 examples of the beneficial use of NASA aerospace technology by public and private organizations are described to demonstrate the effects of mission-oriented programs on technological progress in the United States. General observations regarding technology transfer activity are presented. Benefit cases are listed in 20 categories along with pertinent information such as communication link with NASA; the DRI transfer example file number; and individual case numbers associated with the tec...
Keywords: ANGULAR MOMENTUM; INERTIAL PLATFORMS; RIMS; SATELLITE ATTITUDE CONTROL; TRANSVERSE ACCELERATION; AXES OF ROTATION; ELECTROMAGNETS; MAGNETIC CONTROL; MAGNETIC SUSPENSION
|NASA's Spaceliner Investment Area Technology Activities - Hueter, Uw|
NASA's has established long term goals for access-to-space. The third generation launch systems are to be fully reusable and operational around 2025. The goals for the third generation launch system are to significantly reduce cost and improve safety over current conditions. The Advanced Space Transportation Program Office (ASTP) at the NASA's Marshall Space Flight Center in Huntsville, AL has the agency lead to develop space transportation technologies...
Keywords: ANGULAR MOMENTUM; COMPUTATION; OCEAN MODELS; DATA SYSTEMS; EARTH ROTATION; TIME SERIES ANALYSIS; TEMPORAL RESOLUTION; POLAR WANDERING (GEOLOGY); ASSIMILATION
|Integrated modeling tool for performance engineering of complex computer systems - Wright, Gary|
This report summarizes Advanced System Technologies' accomplishments on the Phase 2 SBIR contract NAS7-995. The technical objectives of the report are: (1) to develop an evaluation version of a graphical, integrated modeling language according to the specification resulting from the Phase 2 research; and (2) to determine the degree to which the language meets its objectives by evaluating ease of use, utility of two sets of performance predictions, and the power of the language constructs...
Keywords: CONSTITUTIVE EQUATIONS; COMPATIBILITY; PLATE THEORY; STABILITY; DEFORMATION; ELASTIC BODIES; ELASTOPLASTICITY; FINITE ELEMENT METHOD; SOLIDS; VISCOPLASTICITY; ALGORITHMS; ANGULAR MOMENTUM
|Pioneer odyssey - Fimmel, R. O|
The Pioneer Jupiter Mission is discussed in terms of objectives, hazards, spacecraft design, and communication techniques. The scientific payloads of both Pioneer 10 and Pioneer 11 designed to gather knowledge on interplanetary space beyond Mars and on the Jovian system are included. Mission accomplishments are described.
Keywords: AFTERBODIES; BODY-WING AND TAIL CONFIGURATIONS; FUSELAGES; LIGHT AIRCRAFT; SPIN TESTS; AIRFRAMES; ANGULAR MOMENTUM; SPIN STABILIZATION; WIND TUNNEL TESTS
|Space Flight Experiments to Measure Polymer Erosion and Contamination on Spacecraft - Lillis, Maura C.|
Atomic oxygen erosion and silicone contamination are serious issues that could damage or destroy spacecraft components after orbiting for an extended period of time, such as on a space station or satellite. An experiment, the Polymer Erosion And Contamination Experiment (PEACE) will be conducted to study the effects of atomic oxygen (AO) erosion and silicone contamination, and it will provide information and contribute to a solution for these problems...
Keywords: ACTUATORS; MALFUNCTIONS; SOLAR SENSORS; CONTROL SYSTEMS DESIGN; DETECTION; FAILURE; MICROWAVE PROBES; ANGULAR MOMENTUM; ATTITUDE (INCLINATION); COST REDUCTION; ERRORS
|Introduction to Fuzzy Set Theory - Kosko, Bar|
An introduction to fuzzy set theory is described. Topics covered include: neural networks and fuzzy systems; the dynamical systems approach to machine intelligence; intelligent behavior as adaptive model-free estimation; fuzziness versus probability; fuzzy sets; the entropy-subsethood theorem; adaptive fuzzy systems for backing up a truck-and-trailer; product-space clustering with differential competitive learning; and adaptive fuzzy system for target tracking.
Keywords: ANGULAR MOMENTUM; ATTITUDE CONTROL; MANY BODY PROBLEM; MATHEMATICAL MODELS; PLANAR STRUCTURES; SPACECRAFT STRUCTURES; NONLINEAR SYSTEMS; SPACECRAFT MANEUVERS
|Models of Elementary Particles - Bernard T. Feld|
Bernard T. Feld Models of Elementary Particles Blaisdell Publishing Company ( Ginn & Co.) 1969 Acrobat 7 Pdf 21.2 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Reactions; S-Matrix; Isotopic Spin; Angular Momentum; Hadron; Quark; SU(3); SU(6); Weak Decay; Clebsch-Gordan
|Overview of X-38 Hypersonic Aerothermodynamic Wind Tunnel Data and Comparison with Numerical Results - Campbell, C.|
A NASA team of engineers has been organized to design a crew return vehicle for returning International Space Station crew members from orbit. The hypersonic aerothermodynamic characteristics of the X-23/X-24A derived X-38 crew return vehicle are being evaluated in various wind tunnels in support of this effort. Aerothermodynamic data from two NASA hypersonic tunnels at Mach 6 and Mach 10 has been obtained with cast ceramic models and a thermographic phosphorus digital imaging system...
Keywords: THRUST VECTOR CONTROL; APPROACH CONTROL; STATIC STABILITY; UNSTEADY FLOW; MOMENTUM TRANSFER; FLIGHT TEST VEHICLES; FEEDBACK CONTROL; ANGULAR MOMENTUM
|Development of a Method for Local Electron Temperature and Density Measurements in the Divertor of the JET Tokamak - Jupen, C.|
Plasma volume recombination in the divertor, a process in which charged particles recombine to neutral atoms, contributes to plasma detachment and hence cooling at the divertor target region. Detachment has been observed at JET and other tokamaks and is known to occur at low electron temperatures (T(sub e))1 eV) and at high electron density (n(sub e)10(exp 20)/m(exp 3)). The ability to measure such low temperatures is therefore of interest for modelling the divertor...
Keywords: GRAVITATION; LINEAR POLARIZATION; RELATIVITY; MISALIGNMENT; SPIN-ORBIT INTERACTIONS; PULSARS; X RAY BINARIES; MATHEMATICAL MODELS; COUPLING; ANGULAR MOMENTUM; GYROSCOPES; ABERRATION
|Deterministic and Probabilistic Creep and Creep Rupture Enhancement to CARES/Creep: Multiaxial Creep Life Prediction of Ceramic Structures Using Continuum Damage Mechanics and the Finite Element Method - Jadaan, Osama M.|
High temperature and long duration applications of monolithic ceramics can place their failure mode in the creep rupture regime. A previous model advanced by the authors described a methodology by which the creep rupture life of a loaded component can be predicted. That model was based on the life fraction damage accumulation rule in association with the modified Monkman-Grant creep ripture criterion However, that model did not take into account the deteriorating state of the material due to cre...
Keywords: LUNAR TIDES; ESTIMATING; SATELLITE TRACKING; ANGULAR MOMENTUM; DIURNAL VARIATIONS; OCEAN CURRENTS; PERIODIC VARIATIONS; TORQUE; EARTH ROTATION; ALTIMETERS; FREQUENCIES
|A dual-cavity ruby maser for the Ka-band link experiment - Shell, J.|
A 33.68-GHz dual-cavity ruby maser was built to support the Ka-Band Link Experiment (KABLE) conducted with the Mars Observer spacecraft. It has 25 dB of net gain and a 3-dB bandwidth of 85 MHz. Its noise temperature in reference to the cooled feedhorn aperture is 5 K.
Keywords: DYNAMIC MODELS; ATTITUDE (INCLINATION); LIQUID-VAPOR INTERFACES; MATHEMATICAL MODELS; SPACECRAFT ENVIRONMENTS; VIBRATION; LIQUID HELIUM 2; LIQUID SLOSHING; SPACECRAFT CONTROL; SPACECRAFT MOTION; SPACECRAFT STABILITY; SUPERFLUIDITY; AERODYNAMIC DRAG; ANGULAR MOMENTUM
|Thermally stimulated conductivity studies of trapping centers in alkali borosilicate glasses - Catchings, R. M|
No Abstract Available
Keywords: ASTRONOMY; INCOMPRESSIBLE FLUIDS; INTERFACIAL TENSION; JUPITER (PLANET); WEIGHTLESSNESS; DROPS (LIQUIDS); GRAVITATIONAL EFFECTS; NUCLEAR PHYSICS; PLANETARY ROTATION; ROTATING FLUIDS; ROTATING SPHERES; STELLAR ROTATION; ANGULAR MOMENTUM
|Superconducting magnet - NON|
Extensive computer based engineering design effort resulted in optimization of a superconducting magnet design with an average bulk current density of approximately 12KA/cm(2). Twisted, stranded 0.0045 inch diameter NbTi superconductor in a copper matrix was selected. Winding the coil from this bundle facilitated uniform winding of the small diameter wire. Test coils were wound using a first lot of the wire...
Keywords: AEROSPACE ENVIRONMENTS; SPACECRAFT SURVIVABILITY; ANGULAR MOMENTUM; COSMIC RAYS; MOMENTUM TRANSFER; PARTICLE TRAJECTORIES; STOCHASTIC PROCESSES; MATHEMATICAL MODELS; MONTE CARLO METHOD; SPACECRAFT DESIGN
|Test and evaluation of a multifunction keyboard and a dedicated keyboard for control of a flight management computer - Crane, J. M.|
A flight management computer (FMC) control display unit (CDU) test was conducted to compare two types of input devices: a fixed legend (dedicated) keyboard and a programmable legend (multifunction) keyboard. The task used for comparison was operation of the flight management computer for the Boeing 737-300. The same tasks were performed by twelve pilots on the FMC control display unit configured with a programmable legend keyboard and with the currently used B737-300 dedicated keyboard...
Keywords: ATMOSPHERIC CIRCULATION; SPATIAL RESOLUTION; VELOCITY; VERTICAL ORIENTATION; WINDS ALOFT; MATHEMATICAL MODELS; METEOROLOGICAL SATELLITES; PRESSURE GRADIENTS; TROPOSPHERE; VARIANCE (STATISTICS); ANGULAR MOMENTUM; CONTINUITY EQUATION; EQUATIONS OF MOTION
|Chemical approach for controlling nadimide cure temperature and rate - NON|
Polyimide resins suitable for use as composite matrix materials are formed by copolymerization of maleic and norbornenyl endcapped monomers and oligomers. The copolymers can be cured at temperatures under about 300 C by controlling the available concentration of the maleic endcapped reactant. This control is achieved by adding sufficient amounts of said maleic reactant or by chemical modification of either copolymer, to either increase Diels-Alder retrogression of the norbornenyl capped reactant...
Keywords: ANOMALIES; MOMENTUM TRANSFER; SPECTRUM ANALYSIS; STELLAR WINDS; BINARY STARS; HEAO 2; IUE; STELLAR EVOLUTION; ULTRAVIOLET ASTRONOMY; ANGULAR MOMENTUM; EMISSION SPECTRA; MASS TRANSFER
|Computational Fluid Dynamic (CFD) analysis of axisymmetric plume and base flow of film/dump cooled rocket nozzle - Tucker, P. K.|
Film/dump cooling a rocket nozzle with fuel rich gas, as in the National Launch System (NLS) Space Transportation Main Engine (STME), adds potential complexities for integrating the engine with the vehicle. The chief concern is that once the film coolant is exhausted from the nozzle, conditions may exist during flight for the fuel-rich film gases to be recirculated to the vehicle base region. The result could be significantly higher base temperatures than would be expected from a regeneratively ...
Keywords: ANGULAR MOMENTUM; DIFFERENTIAL EQUATIONS; GRAPHS (CHARTS); NORMALIZING (STATISTICS); SCHROEDINGER EQUATION; CLASSICAL MECHANICS; CONSERVATION LAWS; MOLECULAR ORBITALS; MOLECULAR TRAJECTORIES; OSCILLATORS; PRECESSION; QUANTUM MECHANICS; BOUNDARY CONDITIONS
|Space life sciences: A status report - NON|
The scientific research and supporting technology development conducted in the Space Life Sciences Program is described. Accomplishments of the past year are highlighted. Plans for future activities are outlined. Some specific areas of study include the following: Crew health and safety; What happens to humans in space; Gravity, life, and space; Sustenance in space; Life and planet Earth; Life in the Universe; Promoting good science and good will; Building a future for the space life sciences; a...
Keywords: ASTRONOMICAL MODELS; CONFERENCES; MASS DISTRIBUTION; PLANETARY ATMOSPHERES; PROTOPLANETS; U.S.S.R; UNITED STATES; PLANETARY EVOLUTION; PLANETARY NEBULAE; PLANETOLOGY; PLANETS; SOLAR SYSTEM; STELLAR EVOLUTION; ANGULAR MOMENTUM; COMETS
|Analytical and experimental study of flow phenomena in noncavitating rocket pump inducers - Lakshminarayana, B|
The flow processes in rocket pump inducers are summarized. The experimental investigations were carried out with air as the test medium. The major characteristics features of the rocket pump inducers are low flow coefficient (0.05 to 0.2) large stagger angle (70 deg to 85 deg) and high solidity blades of little or no camber. The investigations are concerned with the effect of viscosity not the effects of cavitation...
Keywords: ANGULAR MOMENTUM; FLIGHT MECHANICS; MATHEMATICAL MODELS; SATELLITE ANTENNAS; SOLAR ARRAYS; LANDSAT 4; SATELLITE ATTITUDE CONTROL; SATELLITE PERTURBATION; TORQUE; ALGORITHMS; ATTITUDE STABILITY; COMPUTERIZED SIMULATION; EQUATIONS OF MOTION
|A Numerical Evaluation of Icing Effects on a Natural Laminar Flow Airfoil - Chung, James J.|
As a part of CFD code validation efforts within the Icing Branch of NASA Glenn Research Center, computations were performed for natural laminar flow (NLF) airfoil, NLF-0414. with 6 and 22.5 minute ice accretions. Both 3-D ice castings and 2-D machine-generated ice shapes were used in wind tunnel tests to study the effects of natural ice is well as simulated ice. They were mounted in the test section of the Low Turbulence Pressure Tunnel (LTPT) at NASA Langley that the 2-dimensionality of the flo...
Keywords: MARS ATMOSPHERE; VORTICES; METEOROLOGY; ATMOSPHERIC GENERAL CIRCULATION MODELS; ANNUAL VARIATIONS; MARS GLOBAL SURVEYOR; MARS SURFACE; WATER VAPOR; DUST; WAVE PROPAGATION; ANGULAR MOMENTUM
|Carbon-carbon cylinder block - NON|
A lightweight cylinder block composed of carbon-carbon is disclosed. The use of carbon-carbon over conventional materials, such as cast iron or aluminum, reduces the weight of the cylinder block and improves thermal efficiency of the internal combustion reciprocating engine. Due to the negligible coefficient of thermal expansion and unique strength at elevated temperatures of carbon-carbon, the piston-to-cylinder wall clearance can be small, especially when the carbon-carbon cylinder block is us...
Keywords: EARTH ROTATION; TORQUE; MOMENTUM TRANSFER; SOUTH AMERICA; TIME SERIES ANALYSIS; ANGULAR MOMENTUM; EARTH ATMOSPHERE; VARIATIONS; GEODETIC ACCURACY; GEODETIC SURVEYS; WIND MEASUREMENT; ZONAL FLOW (METEOROLOGY); PERTURBATION
|Investigation into the role of sodium chloride deposited on oxide and metal substrates in the initiation of hot corrosion - Birks, N|
Sodium chloride is deposited on the surface of alumina substrates and exposed to air containing 1% SO2 at temperatures between 500 C and 700 C. In all cases the sodium chloride was converted to sodium sulfate. The volatilization of sodium chloride from the original salt particles was responsible for the development of a uniform coating of sodium sulfate on the alumina substrate. At temperatures above 625 C, a liquid NaCl-Na2SO4 autectic was formed on the substrate...
Keywords: SPACE RENDEZVOUS; TUMBLING MOTION; SPACECRAFT DOCKING; VIDEO EQUIPMENT; ANGULAR MOMENTUM; FIELD OF VIEW; HIGH RESOLUTION; KALMAN FILTERS; NEWTON-RAPHSON METHOD; ROCKET ENGINES
|Development of an Antimicrobial Susceptibility Testing Method Suitable for Performing During Space Flight - Jorgensen, James H.|
Very little is known regarding the affects of the microgravity environment of space flight upon the action of antimicrobial agents on bacterial pathogens. This study was undertaken to develop a simple method for conducting antibacterial susceptibility tests during a Space Shuttle mission. Specially prepared susceptibility test research cards (bioMerieux Vitek, Hazelwood, MO) were designed to include 6-11 serial two-fold dilutions of 14 antimicrobial agents, including penicillins, cephalosporins,...
Keywords: ACTIVE GALACTIC NUCLEI; INTERSTELLAR MAGNETIC FIELDS; ACOUSTIC VELOCITY; GALACTIC NUCLEI; ANGULAR MOMENTUM; PERTURBATION; RADIATION EFFECTS; RADIATION PRESSURE; THERMAL RADIATION; X RAYS; EXTRATERRESTRIAL MATTER; IONIZED GASES; LUMINOSITY; MAGNETOHYDRODYNAMIC WAVES; RELATIVISTIC PARTICLES; SEYFERT GALAXIES; PLASMA CLOUDS; INFRARED CIRRUS (ASTRONOMY)
|An Acoustic Charge Transport Imager for High Definition Television Applications: Low-Voltage SAW Amplifiers on Multilayer GaAs/ZnO Substrates - Hunt, W. D.|
This thesis addresses the acoustoelectric issues concerning the amplification of surface acoustic waves (SAWs) and the reflection of SAWs from slanted reflector gratings on GaAs, with application to a novel acoustic charge transport (ACT) device architecture. First a simple model of the SAWAMP was developed, which was subsequently used to define the epitaxially grown material structure necessary to provide simultaneously high resistance and high electron mobility...
Keywords: X RAY SOURCES; EXHAUST EMISSION; EXHAUST GASES; LUMINOSITY; PHOTOMETRY; PLEIADES CLUSTER; RADIAL VELOCITY; SHOCK HEATING; STAR DISTRIBUTION; STELLAR MASS; OPEN CLUSTERS; HIGH RESOLUTION; DATA ACQUISITION; B STARS; ROSAT MISSION; ANGULAR MOMENTUM; COLOR; CORRELATION
|Total Solar Eclipse of 2001 June 21 - Espenak, Fred|
On 2001 June 21, a total eclipse of the Sun will be visible from within a narrow corridor which traverses the Southern Hemisphere. The path of the Moon's umbral shadow begins in the South Atlantic, crosses southern Africa and Madagascar, and ends at sunset in the Indian Ocean. A partial eclipse will be seen within the much broader path of the Moon's penumbral shadow, which includes eastern South America and the southern two thirds of Africa...
Keywords: PREMIXED FLAMES; AIR JETS; ANGULAR MOMENTUM; CERAMIC MATRIX COMPOSITES; CIRCULATION; COSTS; DECELERATION; FLOW VELOCITY; FLUE GASES; FUEL FLOW; GAS TURBINES; COMBUSTION; HEATING; TURBULENCE; SWIRLING; STABILIZATION; BURNERS; CORE FLOW; LABORATORY EQUIPMENT; LOW TEMPERATURE; COMBUSTION CHAMBERS
|Flightweight Carbon Nanotube Magnet Technology - Chapman, J. N.|
Virtually all plasma-based systems for advanced airborne/spaceborne propulsion and power depend upon the future availability of flightweight magnet technology. Unfortunately, current technology for resistive and superconducting magnets yields system weights that tend to counteract the performance advantages normally associated with advanced plasma-based concepts. The ongoing nanotechnology revolution and the continuing development of carbon nanotubes (CNT), however, may ultimately relieve this l...
Keywords: SPACECRAFT CONTROL; VECTORS (MATHEMATICS); ENERGY STORAGE; KINETIC ENERGY; INTERNATIONAL SPACE STATION; SPACECRAFT MANEUVERS; LINEAR QUADRATIC REGULATOR; ANGULAR MOMENTUM; ATTITUDE CONTROL; CONTROL MOMENT GYROSCOPES; FLYWHEELS; CONTROL SYSTEMS DESIGN; CONTROL SIMULATION; CONTROL THEORY; EQUATIONS OF MOTION; NONLINEAR EQUATIONS